Could be lots of things. I'd wait and see how it looks after the lawn has really gotten going. They could be foot prints from somebody walking on the frost, could be patches of different grasses coming out of dormancy later, literally dozens of possibilities.

HUH????? This is both correct AND incorrect. Mostly incorrect. Plants foll temperature, and soils are nt affected by temperature...only ambient temps. But plants themselves ARE affected by wind chills....VERY affected. In caes like this, foliage can be burned. This looks very much like the case, here. Much the same way chemical burn works, wind does essentially the same thing. If you have ever seen the damage up here that can happen to other types of plants, as well, you would know exactly what I'm talking about. We have a term up here for this called winter dessication. If you have ever seen nursery stock with whole sides of it's foliage (let alone smaller parts) taken off, you would know what is meat by this. Many times, evergreen types are susceptible to this when exposed to wide open areas that are facing the west and/or southwest. Some are even more fragile than others...for instance, Alberta spruce is VERY susceptible compared to thing like Norway Blue or Scotch. Cedar arbos are somewhat susceptible, too - especially when young and more tender.

Joe

Thank you, Dad - for always being the dad that you were. You truly are my hero. You always were.